Fig. 1From: Differences in expression of the cancer stem cell marker aldehyde dehydrogenase 1 among estrogen receptor-positive/human epidermal growth factor receptor type 2-negative breast cancer cases with early, late, and no recurrenceImmunohistochemical staining of aldehyde dehydrogenase 1 (ALDH1) in breast tumor cells. a Essentially all of the tumor cells are positive for ALDH1. b No ALDH1-positive cells are presentBack to article page